{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "645526985",
    "entityType": "User",
    "nonce": "0x69cdfb6b8c5f6445189319840a62b889bd67e00ac21fe4a8d531880f7129308b",
    "signature": "0xde3724b0b99b14842a6e79d018924b01f73dc841d7a6ea39b1feac40b5be5da82301d6dfaa454d9035be9e28e9b440a7b13bdb7fa6cfbac3ff8376d3424ca4931b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}